You are not being dealt with by a Fixed Penalty Notice so other factors must come in to play. Now here is the bad news, presuming you have held a full licence for two years the maximum penalty's can be: ¬£1000 fine, 28 day ban and six points. You may be offered a speed awareness course which will reduce the penalty. If it's less than two years since you passed your test you could have your licence revoked.
48mph in a 30mph zone is 60% over the limit or 112mph in a 70mph (motorway) zone!

champer

I take it you weren't offered a fixed penalty, which would have got you 3 points and a ¬£60 fine. In that case it is very likely to be as "isitme" says.

"isitme"

For 16-25MPH over the posted limit, the fine is between ¬£45 and ¬£100 + ¬£30 costs + 4 points.
http://www.ukmotorists.com/speeding%20fines.asp

will my unpaid fines revert back to the courts so i can pay them there as a few years ago this is what happened previously and they reverted back to the original fine without all the costs but im not ...

I have never been in trouble with the police exept this accidental case it is stopping me from moving on in my career and i would like to know its been 4 yrs is it possible to have the caution taken ...